1. Lawrence JS, Bremner JM, Bier F: Osteoarthritis, prevalence in the population and relationship between symptoms and X-ray changes. Ann Rheum Dis. 1966, 25: 1-24.
2. Arthritis Research Campaign: Factfile – arthritis at a glance. 2003, [ http://http.//www.arc.org.uk ]
3. Creamer P, Flores R, Hochberg MC: Management of osteoarthritis in older adults. Clin Geriatr Med. 1998, 14: 435-454.
4. Pham T, van der Heijde D, Lassere M, Altman RD, Anderson JJ, Bellamy N, Hochberg M, Simon L, Strand V, Woodworth T, Dougados M: Outcome variables for osteoarthritis clinical trials: The OMERACT-OARSI set of responder criteria. J Rheumatol. 2003, 30: 1648-1654.
5. Anon: Recommendations of the medical management of osteoarthritis of the hip and knee: 2000 update. Arthritis Rheum. 2000, American College of Rheumatology Subcommittee on Osteoarthritis, 43: 1905-1915. 10.1002/1529-0131(200009)43:9<1905::AID-ANR1>3.0.CO;2-P.